A “Little” strike in this industry led to the 1937 Memorial Day Massacre in Chicago. The Supreme Court blocked the Truman administration’s attempt to seize properties in (10[1])this industry in the (10[1])Youngstown case. (10[1])Alexander Berkman was arrested for attempting to stab an executive in this industry, (10[1])Henry Clay Frick. (10[1])A businessman (10[1])in this industry who (-5[1])funded the American Anti-Imperialist League described the duties of philanthropy in “The Gospel of Wealth.” Pinkerton (10[1])agents engaged in a shootout (-5[1])with striking workers in this industry in Homestead, Pennsylvania. For 10 points, Pittsburgh was a center for what industry in which Andrew Carnegie became a billionaire? ■END■ (10[2])